2156435460 has 72 divisors (see below), whose sum is σ = 6783469056. Its totient is φ = 575048160.

The previous prime is 2156435459. The next prime is 2156435473. The reversal of 2156435460 is 645346512.

2156435460 is a `hidden beast` number, since 2 + 1 + 5 + 643 + 5 + 4 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216996 + ... + 226715.

It is an arithmetic number, because the mean of its divisors is an integer number (94214848).

Almost surely, 2^2156435460 is an apocalyptic number.

2156435460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156435460 is an abundant number, since it is smaller than the sum of its proper divisors (4627033596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156435460 is a wasteful number, since it uses less digits than its factorization.

2156435460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443735 (or 443721 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2156435460 is about 46437.4359757298. The cubic root of 2156435460 is about 1291.9493513423.

The spelling of 2156435460 in words is "two billion, one hundred fifty-six million, four hundred thirty-five thousand, four hundred sixty".